Upgrade Your Power Designs with SLKOR MMBTA42 - The High-Performance NPN Transistor Alternative to ST & Onsemi!

 SLKOR MMBTA42: A High-Voltage, Compact NPN Transistor for Demanding Applications

 SLKOR introduces the MMBTA42 — an ideal high-performance alternative to STMicroelectronics and Onsemi’s MMBTA42. Designed for high-voltage, low-current switching, this 300V NPN bipolar transistor delivers reliable performance in compact form.

  • Type: NPN
  • Collector-Emitter Voltage (Vceo): 300V
  • Collector Current (Ic): 0.3A
  • Power Dissipation (Pd): 0.35W
  • Transition Frequency (fT): 50MHz

Perfect for applications requiring high voltage handling in a small package, the SLKOR MMBTA42 ensures performance, availability, and cost-efficiency — making it a seamless drop-in replacement.

Product Description:
 The SLKOR MMBTA42 is a high-voltage NPN bipolar junction transistor (BJT) designed for robust, high-efficiency performance across a broad spectrum of electronic applications. Encased in a compact SOT-23 package, it offers:

  • Collector-Emitter Voltage (VCEO): Up to 300V
  • Continuous Collector Current (IC): 0.3A
  • Power Dissipation (PD): 0.35W
  • Transition Frequency (fT): 50MHz

With its high breakdown voltage and low collector-emitter saturation voltage, the MMBTA42 ensures reliable switching and signal amplification, even in space-constrained or high-voltage environments.

Key Features:

  • High-voltage tolerance for demanding circuit condition
  • Low V<sub>CE(sat)</sub> for improved energy efficiency
  • Complementary to the MMBTA92 (PNP), allowing for flexible push-pull or class B amplifier designs

Engineered for designers seeking a dependable and cost-effective substitute for STMicroelectronics or Onsemi MMBTA42, the SLKOR version combines solid performance with consistent supply chain support.

Applications:
 The SLKOR MMBTA42 is well-suited for a variety of high-voltage, low-to-medium power applications, including:

  • Switching Circuits: Ideal for efficient switching in general-purpose and industrial electronic designs
  • Voltage Regulation: Ensures stable output in regulated power supply circuits for consumer and industrial devices
  • Audio Amplifiers: Suitable for low-to-moderate power signal amplification in analog audio stages
  • Power Management: Delivers reliable performance in DC-DC converters, battery-operated systems, and auxiliary power modules

Absolute Maximum Ratings (at Ta = 25°C unless otherwise specified):

  • VCBO (Collector-Base Voltage): 300V
  • VCEO (Collector-Emitter Voltage): 300V
  • VEBO (Emitter-Base Voltage): 5V
  • IC (Collector Current, Continuous): 0.3A

Engineered for durability and versatility, the MMBTA42 offers stable performance across a wide range of operating conditions — making it a trusted choice for both legacy replacements and new designs.

Slkor Alternative Equivalents to STMicroelectronics

| STMicroelectronics Part Number | Slkor Part Number | Product Category | Package |

| BTA06–800BWRG | BTA06–800B | SCR | TO-220 |
| BTA08–800BWRG | BTA08–800B | SCR | TO-220 |
| BTA12–600BWRG | BTA12–600B | SCR | TO-220 |
| BTA16–800BWRG | BTA16–800B | SCR | TO-220 |
| BTA24–800BWRG | BTA24–800B | SCR | TO-220 |
| BTA26–800BWRG | BTA26–800B | SCR | TO-3P |
| BTA41–800BRG | BTA41–800B | SCR | TO-3P |
| BTA41–1200BRG | BTA41–1200B | SCR | TO-3P |
| ZMM5V1 | ZMM5V1 | Zener Diode | LL-34 |
| TIP122 | TIP122 | Darlington Array | TO-220 |
| TIP127 | TIP127 | Darlington Array | TO-220 |
| ULN2001D1013TR | ULN2001D | Darlington Array | SOP-16 |
| L4949 | SL4949 | Linear Regulator | SOP-8 |
| LM317T-DGZ | LM317 | Linear Regulator | TO-220 |
| LMV321ILT | LMV321 | Op-amp | SOT-23–5 |
| M24C02-WMN6TP | SL24C02D | EEPROM | SOP-8 |
| MMBTA42 | MMBTA42 | Transistor | SOT-23 |
| MMBT4401 | MMBT4401 | Transistor | SOT-23 |
| MMBT5551 | MMBT5551 | Transistor | SOT-23 |
| MMBT5401 | MMBT5401 | Transistor | SOT-23 |
| MMBT3904 | MMBT3904 | Transistor | SOT-23 |
| MMBT3906 | MMBT3906 | Transistor | SOT-23 |
| MMBT2222A | MMBT2222A | Transistor | SOT-23 |
| D44H11 | SL44H11 | Transistor | TO-220–3L |

For more equivalents please reach out: Slkor03@slkormicro.com

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